It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 842 238 079 is not a prime number.
For example, 842 238 079 can be divided by 5 231: 842 238 079 / 5231 = 161 009.
For 842 238 079 to be a prime number, it would have been required that 842 238 079 has only two divisors, i.e., itself and 1.
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842 238 079 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 842 238 079 is about 29 021.338.
Thus, the square root of 842 238 079 is not an integer, and therefore 842 238 079 is not a square number.
The square of a number (here 842 238 079) is the result of the product of this number (842 238 079) by itself (i.e., 842 238 079 × 842 238 079); the square of 842 238 079 is sometimes called "raising 842 238 079 to the power 2", or "842 238 079 squared".
The square of 842 238 079 is 709 364 981 717 610 240 because 842 238 079 × 842 238 079 = 842 238 0792 = 709 364 981 717 610 240.
As a consequence, 842 238 079 is the square root of 709 364 981 717 610 240.
842 238 079 is a number with 9 digits.
The multiples of 842 238 079 are all integers evenly divisible by 842 238 079, that is all numbers such that the remainder of the division by 842 238 079 is zero. There are infinitely many multiples of 842 238 079. The smallest multiples of 842 238 079 are: